Across
- 2. Slow changes in allele frequencies over a long periods of time.
- 4. When two organisms change in response to each other forming a specialized relationship. Ex. predator and prey.
- 5. when isolation, such as geographically, causes two populations of organisms to become so different that they can no longer reproduce with each other and create viable offspring.
- 9. Study of nucleic acids and proteins to show evolutionary relationships
- 12. How well an organism can survive and reproduce in its environment.
- 14. The sudden elimination of a species due to a catastrophic event
- 15. study of the distribution of plants and animals on Earth
- 17. Field of classifying organisms & assigning each organism a universally accepted name.
- 18. Biological change over time that causes descendants to be different from their ancestors.
- 19. Similar structures due to living in similar environments, not due to ancestral relatedness.
- 20. Differences in the physical traits of organisms.
Down
- 1. Body structures that are similar in orientation, but completely different in function due to organisms living in different environment.
- 3. Remnants of animals (bones, footprints, feces, etc)
- 6. Elimination of a species
- 7. Organisms with traits that make them better adapted to their environment will live longer and reproduce more than organisms less adapted to the environment.
- 8. When unrelated species evolve similar characteristics because they live in similar environments
- 10. A number of different species arise from one common ancestor.
- 11. A physical trait that increases an organism's ability to survive in its environment.
- 13. The study of the embryonic development in vertebrates that has led to support the theory of common ancestry among vertebrates.
- 16. The study of prehistoric life that allows scientists to make connections between current and extinct species